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    <script>
        // 斐波那契数列，递归
        function fibonacci(n) {
            
            if(n < 1 || typeof n !== 'number') {
                return "参数不合法";
            }

            if (n === 1 || n === 2) {
                return 1;
            }
            return fibonacci(n - 1) + fibonacci(n - 2)
        }

        console.log(fibonacci(true))
    </script>
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